Abrading or polishing machine.



Patented Apr. 30, 190i. 0. S. YABNELL.

- ABRADING 0R POLISHING MACHINE.

" (Application filed. .nm. 9, 1901.

i 2 Sheats Shaot I.

(No Model.)

No. 672,930. Patented Apr. 30, l9fll C. S. YARNELL.

ABRADING 0R POLISHING MACHINE.

(Applicatioq filed Jan. 9, 1901.) (lo Model.)

2 Sheets-$heet 2.

UNITED STATES PATENT OFFICE.

CHARLES S. YARNELL, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO MOORE OARVING MACHINE COMPANY, OF SAME PLACE.

ABRADING OR POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 672,930, dated April 30, 1901.

Application filed. January 9,1901- Serial No. H.643- NO mo m T al whom it m y COW/067%! rection rearwardly a short distance. A car- Be it known that 1, CHARLES S. YARNELL, riage 10 is mounted reciprocably on the guideof Minneapolis,in the county ofHennepin and bar, and this carriage is provided with an State of Minnesota, have invented a new and abrader or buffer 11, adapted to bear on the 55 useful Improvementin Abrading or Polishing material, and by its movement thereon to Machines, of which the followingis a descripabrade or polish it. The guide-bar 9 is 30 tion, reference being had to the accompanysupported on the post 8 as to be capable of ing drawings, which are a part of this specifiswinging vertically and slightly laterally, its I cation. lateral movement being limited by guard- 60 10 My invention relates to an improved maarms 12 12, secured on the post 8. At its rearchine adapted for abrading or polishing plane end the guide-bar is connected by an adjustsurfaces by the use of a reciprocating abrader able, elastic, and extensible rod 13 to a fixed or buffer. attachment conveniently to the floor on which An important feature of my improved mathe machine stands. This elastic and ad- 65 15 chine is that the machine is a compact conjustable rod is adapted to counterbalance apstruction occupying comparatively small proximately the carriage l0 and its load on space, and yet is so built as to secure a dethe other extremity of the guide-bar. A bar sirable long reciprocable movement of .the 14, inserted transversely through the free end abrader or buffer in connection with comof the guide-bar 9, fits snugly but slidably 70 2o pact and suitable mechanism for securing therein, so as to be capable of adjustment end such desirable movement of the abrader or wise through the bar. The bar serves as a bu (fer. handl to b gra ed by the operator.

The invention consists of the machine and A vibrating arm 15 is pivoted at its lower its parts and combinations of parts, as hereend conveniently on the bed-plate 6 and ex- 75 in described and claimed, or the equivalents tending upwardly therefrom is provided at thereof. its upper end with a stud-pin 16, projecting In the drawings, Figure 1 is an elevation of laterally therefrom, and a carriage-driving the complete machine. Fig. 2 is an elevation rod 17 is pivoted on the pin 16 and at its other of the machine at that end shown at the left extremity is connected to the carriage 10. 8o 0 in Fig. 1, parts being broken away and omit- For swinging or vibrating the arm 15, and ted for convenience of illustration. Fig. 3 is thereby reciprocating the buifer or abrader a detail of a vibrating arm located centrally 11, the arm 15 is connected medially by a rod of the construction, as shown in Fig. 1. 18 to a movable member 19, and this movable A suitable support for the moving and 0pmember 19 is in turn connected by a pit-man 85 erative parts of the machine may, as shown 20 to the wrist of a wheel 21, fixed on a shaft in the drawings, consist of a frame 5, provided 22, having its bearings in the frame 5. For with a bed-plate 6, an auxiliary frame 7, and steadying the motion of the machine the a post 8, secured upright on the bed-plate 6. wheel 21 is advisably provided with a heavy In connection with my improved machine a rim, adapting it to serve as a balance-wheel, o table to support the material to be abraded and the wheel and its shaft 22 are mounted or polished is required, and I have shown at in hearings in the frame as near the floor or A a suitable table therefor, which illustrates main support of the machine as is conventhe method of operation of my improved maiently possible. It will be observed that this chine and the relation of the material to be construction locates the driving-shaft 22 and 95 abraded or polished thereto. As the workthe means for connecting it to the vibrating table forms no part of the present invention, arm 15 in a plane considerably below the a further description of it will not herein be plane of the travel of the abrader or bufier made. A guide-bar 9 is swiveled, and there- 11. The connecting-rod 18 and the pitman by supported on the post 8, and extends in 20 are of course suitably hinged or pivoted I00 one direction therefrom forwardly over the at their respective ends to the members of material-supporting table and in the other dithe construction to which they are connected.

The movable member 19 is advisably a swinging arm pivoted at its lower extremity on a rod or pivot-pin 23, fixed in the frame 7. This movable member 19, being in the form of a swinging arm, is also pivoted, and thereby supported near the floor or foundation on which the machine is supported, thereby also obviating jar or vibration to a maximum extent. The vibrating arm 15 is advisably made furcate at its lower extremity, so that its two short terminal legs, being pivoted on the frame at a distance apart, furnish a steady support for the arm against vibration laterally. A similar form of construction is advisable for the member 19 and is so shown in the drawings.

A brake 24, operated by a rod 25 and crankhandle 26, is provided for controlling the motion of the wheel 21 and the mechanism connected operatively therewith. The shaft 22 is provided with a fixed stepped band-wheel 27 for connecting the shaft to a source of power.

What I claim as my invention is 1. In an abrading or polishing machine, the combination with a reciprocable abrader or polisher, of a hinged and vibrating arm connected to the abrader or polisher, a correspondingly-movable member connected to the vibrating arm medially, a driven shaft, and a pitman connecting said movable member to an eccentric wrist on said shaft.

2. In an abrading or polishing machine, a means for reciprocating an abrader or polisher comprising a driven shaft, a vibrating arm 19, a pitman connecting an eccentric wrist on the shaft to said arm, another vibrating arm 15, a rod connecting the two vibrating arms, and means connecting the vibrating arm (secondly enumerated) to the abrader or polisher.

3. In an abrading or polishing machine, a horizontallydisposed guide-bar, a carriage reciprocable on the guide-bar, an upwardlydisposed vibrating arm adjacent to the guidebar hinged at its lower end on a fixed support and connected at its upper end to said carriage, a second vibrating arm also upright and hinged to a fixed support at its lower end, a

rod connecting said second vibrating arm to said first enumerated vibrating arm medially, a shaft, and a pitman connecting an eccentric wrist-pin on said shaft to said vibrating arm.

4. In an abrading or polishing machine, a horizontally-disposed guide-bar, a carriage reciprocable on the guide-bar, an upright arm capable of vibration alongside the guide-bar, a driven shaft, and means below the guidebar including an intermediate movable member connecting the shaft eccentrically to said vibrating arm medially.

5. In an abrading or polishing machine, a horizontally-disposed guide-bar, a carriage reciprocable on the guide-bar, an upright arm capable of vibration alongside the guide-bar, said arm being furcate at its lower end and hinged by its furcate members to a fixed support so as to prevent vibration laterally, a driven shaft, and means below the guide-bar including an intermediate movable member connecting the shaft eccentrically to said vibrating arm medially.

6. In combination, a driven shaft, a flywheel on the shaft, a long vibrating arm hinged below the shaft to a fixed support and connected near its free end to a reciprocable buffer-carriage, a short vibrating arm opposite to and at a distance from the long vibrating arm, a rod connecting the free end of the short vibrating arm to the long vibrating arm medially, and a pitman connecting the free end of the short vibrating arm to a wrist-pin- 

